USCG Exam PracticeRefrigeration principles and systems
What safety system does 46 CFR §58.20-15 require in a machinery compartment that contains ammonia refrigeration equipment?
- A. A fixed CO2 fire-suppression system with a remote release station outside the compartment.
- ✓ A sprinkler system providing effective water spray with a remote-control device located outside the compartment.Correct
- C. An exhaust ventilation system capable of 30 air changes per hour, activated automatically on gas detection.
- D. A halon total-flooding system interlocked with the compressor shutdown circuit.
Why B is correct
46 CFR §58.20-15(b) specifically requires machinery compartments containing ammonia equipment to be fitted with a sprinkler system providing effective water spray, with the remote-control device located outside the compartment. The regulation does not prescribe CO2, halon, or a specific ventilation change rate for this purpose.
Cited:46 CFR §58.20-15